Reflectance and electrolyte electroreflectance from gold nanorod arrays embedded in a porous alumina matrix

McMillan, Brian G.; Berlouis, L.E.A.; Cruickshank, F. R.; Brevet, P. F.

doi:10.1016/j.jelechem.2005.12.024

Cited by 12 publications

(13 citation statements)

References 22 publications

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“…First, the RI of a porous Cu film (N e ) was calculated by using MaxwellÀGarnett effective medium theory. 20,21 The effective dielectric constant (ε e (= N e 2 )) of a composite containing pores (ε i ) embedded in a host matrix (ε m ) was derived in the following equation.…”

Section: ' Experimental Sectionmentioning

confidence: 99%

Plasmonic Properties of the Multispot Copper-Capped Nanoparticle Array Chip and Its Application to Optical Biosensors for Pathogen Detection of Multiplex DNAs

et al. 2011

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A localized surface plasmon resonance (LSPR)-based optical biosensor in connection with a multispot copper-capped nanoparticle array (MC-NPA) chip was proposed and developed. The copper (Cu) films, used as a shell, formed a "cap-like" layer on the top of the silica nanoparticles, used as a core, in an orderly fashion, to form the surface called a "Cu-capped nanoparticle array chip". The plasmonic properties of this nanostructure type were initially investigated while controlling the shell thickness of the deposited Cu. Also, we quantified the sensitivity of MC-NPA chip to changes in bulk refractive index (RI). As a result of its LSPR properties, the MC-NPA chip displayed a sensitivity of 67.8 nm per RI unit, and the wavelength shift of the LSPR spectrum peak was sensitive to the RI of the surrounding bulk medium, such as the biomolecular layers. Using MC-NPA chips, multiplex sensing of target DNAs from reference bacteria and clinical samples was possible in a quantitative manner with a detection limit of 10 fM (50 zmol). The optical biosensor developed in this study represents a unique approach to performing LSPR that utilizes a simple and cost-effective optical setup with disposable chips.

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Section: ' Experimental Sectionmentioning

confidence: 99%

Plasmonic Properties of the Multispot Copper-Capped Nanoparticle Array Chip and Its Application to Optical Biosensors for Pathogen Detection of Multiplex DNAs

et al. 2011

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“…The ordinary and extraordinary dielectric constants describing this medium were calculated using the Maxwell-Garnett effective medium approximation. The model has been described in our earlier work [21,22] and incorporates some early and fundamental work in this field [23][24][25].…”

Section: Resultsmentioning

confidence: 99%

Reflectance and SERS from an ordered array of gold nanorods

Berlouis

McMillan

Cruickshank

et al. 2007

Electrochimica Acta

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“…The dependencies of the extinction spectra on the angles of incidence and polarization were studied earlier for linear chains [27] and for single twodimensional (2D) layers [28,29] of silver nanoparticles. In the case of highly oriented metal nanorods and nanowires, the large optical anisotropy makes the optical characteristics strongly sensitive to the angle of incidence and polarization state of the exciting light [30][31][32][33][34][35][36]. Transverse and longitudinal plasmon resonances associated with conduction electrons oscillations along short and long nanorod axis, respectively, were observed.…”

Section: Introductionmentioning

confidence: 99%

“…Transverse and longitudinal plasmon resonances associated with conduction electrons oscillations along short and long nanorod axis, respectively, were observed. The interaction between localized longitudinal resonances within individual nanorod results in the formation of coupled modes of the array [33]. Also, the periodic arrangement of nanorods in the array acts as a diffraction grating leading to a sharp interference feature close to the diffraction edge [37].…”

Section: Introductionmentioning

confidence: 99%

Surface Plasmon Modes of Sandwich-Like Metal–Dielectric Nanostructures

et al. 2014

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We established that metal-dielectric nanostructures (consisting of three stacked monolayers of silver nanoparticles incorporated into polymer cross-linked film) can demonstrate three different surface plasmon collective modes. The modes were detected when the extinction spectra of the nanostructures were studied as a function of the incident angle and polarization of the incident light. Two previously known surface plasmon collective modes, namely T and P, associated with particle dipoles parallel and perpendicular to plane of the layer were identified for the polymer films containing one, two, and three monolayers of the particles. The extinction bands of T and P modes exhibited different intensity and frequency dependences on the angle of incidence. More pronounced angular dependences for P mode band indicated the stronger coupling of dipoles for P mode than for T one. A new N mode was observed for the structures consisting of three nanoparticle layers. This mode originated from surface plasmon coupling between adjacent layers. The additional mode significantly increases amount of information that can be obtained from optical response of the nanostructures.

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Reflectance and electrolyte electroreflectance from gold nanorod arrays embedded in a porous alumina matrix

Cited by 12 publications

References 22 publications

Plasmonic Properties of the Multispot Copper-Capped Nanoparticle Array Chip and Its Application to Optical Biosensors for Pathogen Detection of Multiplex DNAs

Plasmonic Properties of the Multispot Copper-Capped Nanoparticle Array Chip and Its Application to Optical Biosensors for Pathogen Detection of Multiplex DNAs

Reflectance and SERS from an ordered array of gold nanorods

Surface Plasmon Modes of Sandwich-Like Metal–Dielectric Nanostructures

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